//C14.14:stacktem.cpp -- testing the template stakc class
#include <iostream>
#include <string>
#include <cctype>
#include "stacktp.h"
using std::cin;
using std::cout;

int main(void)
{
    Stack<std::string> st;    // create an empty stack
    char ch;
    std::string po;
    cout << "Please enter A to add a purchase order,\n"
         << "P to process a PO, or Q to quit.\n";
    while(cin >> ch && std::toupper(ch) != 'Q')
    {
        while(cin.get() != '\n')
        {
            continue;
        }

        if(!std::isalpha(ch))
        {
            cout << '\a';
            continue;
        }

        switch(ch)
        {
            case 'A':
            case 'a': cout << "Enter a PO number to add: ";
                    cin >> po;
                    if(st.isfull())
                    {
                        cout << "stack already full\n";
                    }
                    else 
                    {
                        st.push(po);
                    }
                    break;
            case 'p':
            case 'P': if(st.isempty())
                      {
                          cout << "stack already empty\n";                      
                      }                  
                      else
                      {
                          st.pop(po);
                          cout << "PO #" << po << " popped\n";
                          break;
                      }
        }
        cout << "Please enter A to add a purchase order,\n"
             << "P to process a PO, or Q to quit.\n";
    }     

    cout << "Bye\n";
}